This pic is extracted from a modelisation done with Surfer, this particular item is generated from a DEM file,digital elevation model, these can be freely downloaded from either the Quebec or Canada government sites, there is more layers to this file, but they are made invisible here. The information produced in this software is used as it is in my projects or transferred in QGIS or Autocad for further treatment. More to come on the use of these products and the services offered by my entreprise…as a freelance CAD and GIS applied to my expertise domain, environmental and civil engineering.